The QC35’s are indeed pretty tough. A while back, Bose switched to “Glass-filled nylon” plastic for all of their more expensive headphones and some folks gave them crap about it.
They’re probably smiling right now at Bose with all the Sony plastic cracking issues though.
Sony has silently changed out materials in the past, and I still think that aside from this one issue the 1000X is a pretty good pair of headphones. But people probably shouldn’t have to feel like they’re taking a chance with their money at this price point.